import sys
import re
import json
import os
import requests
from PyQt5.QtWidgets import (
    QApplication, QMainWindow, QWidget, QVBoxLayout, QHBoxLayout,
    QPushButton, QLineEdit, QTextEdit, QStatusBar, QFileDialog,
    QToolBar, QInputDialog, QMessageBox
)
from PyQt5.QtCore import Qt, QThread, pyqtSignal
from PyQt5.QtGui import QFont, QColor

CONFIG_PATH = os.path.expanduser("~/.csdn_downloader_config.json")

class DownloadWorker(QThread):
    finished = pyqtSignal(dict)
    error = pyqtSignal(str)

    def __init__(self, url, cookies=None):
        super().__init__()
        self.url = self._clean_url(url)
        self.cookies = cookies or {}
        self.headers = {
            'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36',
            'Referer': 'https://blog.csdn.net/'
        }

    def _clean_url(self, url):
        return re.sub(r'\?.*', '', url)

    def run(self):
        try:
            # 实际解析逻辑应在此处实现
            # 此处为示例代码，需替换为真实API调用
            if "146581212" not in self.url:
                raise ValueError("示例文章ID未匹配")
            
            # 模拟成功响应
            self.finished.emit({
                'title': '示例文章标题',
                'content': '这是模拟的解析结果内容...',
                'status': 'success'
            })

        except Exception as e:
            self.error.emit(f"解析失败: {str(e)}")

class CSDNDownloader(QMainWindow):
    def __init__(self):
        super().__init__()
        self.cookies = self.load_config()
        self.init_ui()
        self.setup_connections()

    def init_ui(self):
        """精确还原界面截图样式"""
        self.setWindowTitle("CSDN超级下载器 v3.0 跨平台版")
        self.setGeometry(100, 100, 800, 600)
        self.setStyleSheet("""
            QMainWindow {
                background-color: #F0F0F0;
                font-family: 'Microsoft YaHei';
            }
            QLineEdit {
                border: 2px solid #FF4444;
                border-radius: 4px;
                padding: 8px;
                background: #C8E6C9;
            }
            QTextEdit {
                background: white;
                border: 1px solid #CCCCCC;
                padding: 12px;
            }
        """)

        # 主工具栏（精确配色方案）
        main_toolbar = QToolBar()
        self.addToolBar(Qt.TopToolBarArea, main_toolbar)
        for btn in [
            ("平台切换", "#09AAFF"), 
            ("首页", "#4A4A4A"), 
            ("批量下载", "#FF4444"), 
            ("格式工厂", "#9C27B0")
        ]:
            button = QPushButton(btn[0])
            button.setStyleSheet(f"""
                QPushButton {{
                    background-color: {btn[1]};
                    color: white;
                    min-width: 80px;
                    padding: 6px;
                    border-radius: 4px;
                }}
                QPushButton:hover {{ background-color: {btn[1]}DD; }}
            """)
            main_toolbar.addWidget(button)

        # 核心功能区域
        central_widget = QWidget()
        self.setCentralWidget(central_widget)
        layout = QVBoxLayout(central_widget)

        # URL输入框（绿色背景）
        self.url_input = QLineEdit()
        self.url_input.setPlaceholderText("请输入CSDN文章链接")
        self.url_input.setText("https://blog.csdn.net/csdnnews/article/details/146581212")
        layout.addWidget(self.url_input)

        # 功能按钮行（精确配色）
        btn_row = QHBoxLayout()
        for color, text in [
            ("#2196F3", "智能解析"), 
            ("#9C27B0", "格式转换"), 
            ("#4CAF50", "开始下载")
        ]:
            btn = QPushButton(text)
            btn.setStyleSheet(f"""
                QPushButton {{
                    background-color: {color};
                    color: white;
                    min-width: 100px;
                    padding: 8px;
                    border-radius: 4px;
                }}
            """)
            btn_row.addWidget(btn)
        layout.addLayout(btn_row)

        # 结果展示区
        self.result_area = QTextEdit()
        self.result_area.setPlaceholderText("解析结果将在此处显示...")
        layout.addWidget(self.result_area)

        # 状态栏（错误提示）
        self.status_bar = QStatusBar()
        self.status_bar.setStyleSheet("color: #D32F2F;")
        self.setStatusBar(self.status_bar)

    def setup_connections(self):
        """绑定控件事件"""
        self.findChild(QPushButton, "智能解析").clicked.connect(self.start_parse)
        self.findChild(QPushButton, "开始下载").clicked.connect(self.download_content)

    def load_config(self):
        """加载持久化配置"""
        if os.path.exists(CONFIG_PATH):
            try:
                with open(CONFIG_PATH, 'r') as f:
                    return json.load(f).get('cookies', {})
            except:
                return {}
        return {}

    def save_config(self):
        """保存Cookie配置"""
        with open(CONFIG_PATH, 'w') as f:
            json.dump({'cookies': self.cookies}, f)

    def start_parse(self):
        """智能解析功能"""
        url = self.url_input.text().strip()
        if not re.match(r'^https?://blog\.csdn\.net/', url):
            self.status_bar.showMessage("错误：无效的CSDN链接", 5000)
            return

        worker = DownloadWorker(url, self.cookies)
        worker.finished.connect(lambda data: self.result_area.setText(data['content']))
        worker.error.connect(lambda msg: self.status_bar.showMessage(msg, 5000))
        worker.start()

    def download_content(self):
        """文件下载功能"""
        content = self.result_area.toPlainText()
        if not content:
            return

        path, _ = QFileDialog.getSaveFileName(
            self, "保存文件", "csdn_content", "Text Files (*.txt)"
        )
        if path:
            try:
                with open(path, 'w', encoding='utf-8') as f:
                    f.write(content)
                self.status_bar.showMessage(f"文件已保存至：{path}", 5000)
            except Exception as e:
                self.status_bar.showMessage(f"保存失败：{str(e)}", 5000)

if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = CSDNDownloader()
    window.show()
    sys.exit(app.exec_())